Armored pneumatic tire.



W. E. BAUMBERG ARMORED PNEUMATIC TIRE. APPLIcAmN FILED FEB. 28. 1918.

Patented Sept. 3, 1918.

2 SHEETS-SHEET l.

W. E. BAUMBERGER.

ARMORED PNEuM/mc 1111.

APPLICATION FILED FEB. 28. |918.

Pamedsept. 3,1918.

2 SHEETS-SHEE'I 2.

I I f Le] MEaaane/:ger

WALTER E. .BAUMBERGER OF SACIRAMENTO,v CALIFORNIA.

c iralvionnn :PNEUMATIC TIRE.

Specification of Letters Patent.

Application led February 28,1918. Serial No. 219,667.

To all whom t may concern.' i

- kBe it known that I,V WALTER E. BAUM- BERGER, a citizen of the United States of America, residing at Sacramento, `inthe county of Sacramento and lState of California, have invented certain new and-,useful Improvements inA Armored Pneumatic Tires, of which the ollowing'is a specification.

This invention relates 'to armored pneumatic tires. f

The object ofthe invention'is to provide a tire havin all of the advantageous characteristics o `a neumatic tire, and at the same time provi e a'non-puncturable structure. Y

A further objectk of the invention is to provide a tire, whereinthe tube is inclosed in a metal casing or armor, the latter moving eccentrically `with reference to the wheel, when load strain disturbs the air pressure in the tube.` y

Another object of the invention isto provide a structure wherein the load is sustained at circumferential lintervals on the periphery of the wheel, so that-when the sustaining air pressure' in the tube is ldisturbed at any point,'the pressure will bedistributed throughout the tube.

The invention' also aims to provide specic means for supporting the tire'on the wheel, and at the same time provide a structure wherein the tire mayslip on the telly,

when undue load strain is applied.

The invention also comprehends improvements in the details of construction and `arrangement of parts which will be hereinafter described and particularly pointed out in the claims.V

In the accompanying drawings Figure 1 is a side elevation of a wheel equipped with mv improved tire structure.

Fig. 2 is a transverse section of same on the line 2-2 of Fig. 1.

Fig. 3 is a similar view on the line 3-3 of Fig. 1.

Fig. 4; is an enlarged detail section on the f line 4 4, Fig. 3, illustrating the position of the parts when load strain occurs vertically on a line drawn through one of the projections and the axis of the wheel.

Fig. 5 is a similar view but showing the tire in position when load strain occurs on which will a line drawn vertically through the axis of the wheel and between two projections.'

Fig. Gis a detail ,Patented Sept. 3, 1918.

perspective view of one ofthe'caps. Y Y v 1 indicates a wheel, the telly ofv which is provided with a ehannehand as shown is formed in a rim 2but'any other structure perform theV function may be employed. i

3 indicates the `tire structure which yis i mounted on the wheel, the parts being so arranged that there may be a relative movement between the tire and the wheel, as will be hereinafter explained.

L indicates an outer metal casing,f lor armor, comprising annular side plates 5, and an annular tread band 5a, each side plate being provided on its inner periphery with a flange 6, and at its outer periphery with an annular groove 7, and flange 8; Onv the outer periphery of the treadband are two resilient annular tread bands 9, each having beveled sides, and iitt-ing between these bands is a ring 10, havingk beveled edges to engage the sides of bands 9, to key the latter inplace'. 12 `indicates rings, each having a lateral flange 13 which fit. over the vflanges 8, and on which the tread band is supported. The rings engage the grooves 7 and the outer portions are bent inwardly to form beveled surfaces, which engage the outer beveled surfaces of the annular rresilient bands 9, the lateral flanges being fastened to the tread band by securing devices, suchfor instance as screws 15. l s

Extending Vacross the inner peripheral portionk of the annular side plates, rare caps 16, spaced apart to form openings 17. These caps vare retained in xed relation with the snugly over the flanges 6 on the s ide plates. i The clamp rings are also provided lwith lateral flanges 20, which tit over the sides of the caps, and extending from said lateral flanges are lugs 21. The lugs of the respective rings are `disposed-in transverse alinement, and interposed between each adjacent f pair of lugs is a sleeve 22, and extending therethrough is a bolt 23held in locked position by a nut. The bolts and sleeves are interposed between the felly of the wheel and the tire structure, while the lugs 2K1, eX-

tendginwardly and beyondthe periphery of the felly', and serve as guides to' prevent the tire separating from therwheel, should Vthe"V structure about to be'fdescribed, become dis-V engaged from the channel.

Each cap is formed longitudinally o naiif# arc,corresponding` to the arc of the inner peripheryl of the tire, andat opposite 'ends it 'is bent to form curved depressions 23,

which engage the: flanges 8; on the annular.

plates and the tread-band 5a. rThe inner closed-peripheryoffthe'inner casing is providedwith bulges28, Corresponding -tof 'the depressions` 23W in, the caps andv fit snugly therein. Between adj acen't bul'Ofes lthev inner 'casing4 is providedwith :inwardly extended projections 29.whiclipass .through the openings 17,' formedV between adjacent caps. These projections arehof resilient material,

Vand iprojectxbeyond' the capsand` lit in the channel iiitliefelly,-aiid maybe `formed with, or they may be attached to, thefinner casing. 4`In the inner casing is a tube 31, which f assumes the Vccntourof said casing when inflated, air being introduced through. an air valve suitably located near the-felly, or such other point-.as may be found convenient.

. Byreferenceto Fig. l it willi beseen-that the projections are in spaced. relation and that their inner ends frictionally engageV the periphery ofthe wheel inthe channel Furthermore, it vwill-@be noted that because oftheshape and `construction of thefcaps l the inner portion! of the inner casing and the tube assume continuous protuberances anddepressions somewhat after the fashion of =waves.1 *It follows-.thatby reason of this constructionthe load strain ofthe vehicle is-supportedat intervals on separated. air

cushions,lan'dA 'that iiif=tlie yevent of the dis` turbiiig -off the air, the pressure isdis-y tributedl'throughoutwtheentire body of the In. operation, assume .that tloadI pressure is applied, the vwheel willfbe depressed, land tirean'd -wheel' become L eccentric to each otlier,theftire'of course moving as avwhole but the pressure in V'the tubetis distributed throughout the latter. lVhen- :pressure .of the wheel is applied the projections 29 are depressed; consequently the inner casing, acting on "the tube disturbs thecoinpressed 'air' therein', and distributes the pressure. 'The number, and the extent of movement of the vprojections1is' largely.l due to their relative positions with reference to a vertical y'line' drawn through the axis of the wheel. 'Fol` instance, as shown in Fig. l the load pressure is directly in line with Vone ofthe projections 2,9, consequently the depression of the inner casing and the tube will be greater in linel with., this. projectiointhafn that :in line between adjacent projections.

'The load strain is absorbedby twoy elements,

`thatis the resilient projections, plus the Vpressure in thetube,A the result being all yminorshocks will belargely. absorbed bythe projections. However', when. other .than `.whatunay be- Vterinedzniinor shocks occur,

then the resilient projections', plus the pneu- .inatic structure combined, come into play.

When the wheel is depressed .bfyjload strain, as stated,the entire. tirestructure has a bodily movement with reference to the wheel. Therezmust then' beV either afslipping actionbetween the parts, orgtliefmotion must be taken up. The frictional grip between the. projectionsv and the wheel isdetermined bytheV relative length yof.the-projections, plus the amount `ofpressure .inA the tube. Consequently When pressure 'is introduced in the tube, ity acts vto force the projection into contact with the periphery ofthe felly, and likewise, this same action acts to. compress the material ofthe yproj ections. n Under these conditions a tight frictional .grip between tire and wheel is provided. 'It follows that 'whentliewheel-il is depressed, the peripheral surface may-eitlier slipon thel projections remote from the point ofpressure, orthey may yield circumferentially, but #in 'any event/they bei-ng under compression, any slight distortionfbetween the' Wheel and tire will. in no way ,destroy the frictional. relation between1 the vparts at anyI point inthe circumference of the wheel, but if 'abnormal shocks should] occur the movementzof the tire asa wholewill causeV theinner ends of the proj ections-at the top-.of the wheel to vbecome disengaged from the peripheral surface.` 0f course, whenanfabnormalload shock occurs there is agreatermovement between the tire andfwheel, but in no-instance in the normal operation-ofthe tire in case of slight load shocks, is there a time whentlie frictional Contact is destroyed.

In case of accident, or for any other reason and primarily asl-ai safeguard, if'the projections should` become disengaged from the channel, the lugs2l will act as guides to prevent the t-ire'bec'oming,detached from thc Wheel.

IFig.' 5y showsthe--conditioii whenml'oad strain. occurs between adjacent projections.y In this case, two projections are in action to sustain the load, the operation and the movement of the parts being substantially the same as that previously described, ex`

i Vthe tube and innercasing are depressed and become disengaged fromthedepressed walls of the caps, but is intermediately held in contact with the central portion of said caps.

The disposition of the projections, krand the length of the caps will be determined by the diameter of the wheel, and the use to which the tire is to be put.

By disposing the caps and projections as described, there is an alternate arrangement of contact points with the wheel, and points which are in contact between the wheel and the tire, the result being that any disturbance of the air pressure in the tube is distributed throughout the entire tire structure, and at the same time the tire as a whole and the wheel have a relative movement.

While I have described the preferable form of my tire, yet many detail changes may be made without departing from the spirit of the invention,

What I claim is 1. In combination, a channeled wheel felly, a tire mounted thereon, said tire comprising a metal outer casing, an inner iiexible casing inclosed within the metal casing, a continuous tube in the inner casing adapted to contain air under pressure, spaced apart caps on the inner portion of the metal casing, said caps being spaced from the felly of the wheel, and projections extending fromV the inner casing and in frictional engagement with the peripheryof the wheel elly, the caps acting to depress the inner portion of the inner casing and tube between the projections.

2. In combination, a wheel felly, a tire mounted thereon, said tire comprising anV inner and an outer casing inclosing a tube adapted to contain air under pressure, resill- Y ent projections extending from the inner casing and engaging the periphery of the felly, means mounted on the outer casing to engage the inner casing and cause undulations in same and the tube, the pressure in the tube coperating with the resiliency of the projections to cause the latter to frictionally engage the folly, whereby when load` strain is applied the felly acting on the projections will depress the inner casing and the tube adjacent the projections and the outer casing will move as a whole with reference to the felly.

3. In combination, a channeled wheel felly, a `tire mounted thereon comprising an outer metal casing, spaced apart caps extending across the inner portion of the metal casing, each cap having depressions at its ends, an inner :flexible casing, projections f prising a pair of annular metal sides, a metal tread band, spaced caps at the inner portion of the side plates, means between the felly and the tire for securing the caps to the side plates, each cap having depressions, an inner flexible casing inclosed in the outer casing, and fitting snugly in the inner surfaces of the caps, projections extending from the inner casing between the caps and engaging the channeled felly, and a tube adapted to contain air under pressure inclosed'in the inner casing.

5. A tire lcomprising an inner tube adapted to contain air under pressure, a flexible inner casing in which the tube is inclosed, projections extending from the inner casing, and an outer metal casing embracing the inner flexible casing, the metal casing having openings formed on its inner side through which the projections extend7 and said metal casing having an undulating inner surface between the openings, the tube and inner pasing fitting snugly said undulating surace.

6. In combination, a wheel felly, a tire mounted thereon comprising an outer casing provided on its inner portion with caps which are spaced from the felly and are formed with projections, an inner flexible casing inclosed in the outer casing, projections extending from the inner flexible easing and beyond the caps and frictionally en# gaging the felly, and a continuous inner tube inclosed within the inner flexible casing adapted to contain air under pressure, the inner flexible casing and the inner tube lit-y ting the contour provided by the caps and the outer casing.

7. In combination, a wheel felly, a tire mounted thereon, said tire comprising an outer casing provided with undulations on its inner periphery and a plurality of openings, and a yielding continuous tubular member inilated by compressed air and contained in the outer casing, and provided with projections which engage the felly, said tubular member itting snugly the undulations in the outer casing.

8. A tire comprising an outer armored casing provided with undulations on its inner periphery and spaced openings therebetween, an inner casing inclosed inthe outer the inner casing and through the openings and adapted to engage a wheel, and a convtinnons inner tube inflated by compressed air Vand contained in the inner casing.

9. In Combination, aelly, a, tire spaced :t-herefroin,l said tire comprising an outer 5 easingr provided with annular langes, caps extending across the flanges seid caps have ingV depressions, clips engaging the anges and the Caps, said clips extending inwardly beyond the plane of the periphery of the felly, bolts connecting the clips, an inner 10 casing inelosed in the outer easing projections extending from the inner easing and engaging the elly, and an inatedtube i11- elosed in the inner Casing. n

In testimony whereof I afx my signature. 15

-WALTER E. BAUMBERGER.

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' Washington, D. CJ 

